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1.Remove contaminants or corrosion from the brake disc surface.
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2.Use a micrometer to measure the brake disc thickness at minimum eight points which are
10 mm inward from its circumference.
<Front>
Standard value: 26.0 mm <Russia>, 24.0 mm <Europe> Limit: 24.4 mm <Russia>, 22.4 mm <Europe>
<Rear>
Standard value: 10.0 mm Limit: 8.4 mm
3.If the brake disc thickness is worn beyond the limit value at more than one point,
replace the brake disc and check its run-out.
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1.Remove contaminants or corrosion from the brake disc surface.
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2.Use a micrometer to measure the brake disc thickness at minimum eight points which are
10 mm inward from its circumference. Then record the measurements. 3.If the brake disc thickness unevenness (the difference between the maximum and minimum
values measured above) is 0.015 mm or less, it is within the standard value.
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4.If the brake disc thickness unevenness exceeds the standard value, grind it according
to the procedure below while it is mounted on the vehicle.
note |
If it is suspected that the brake disc thickness will become less than the limit value
after the grinding, replace the brake disc and check its run-out.
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(1)
Check for wheel bearing looseness in the axial direction (Refer to GROUP 26 - On-vehicle
Service, Wheel bearing axial play check <Front>,
GROUP 27A - On-vehicle Service, Wheel bearing axial play check <Rear
(2WD)> or GROUP 27B - On-vehicle Service, Wheel bearing axial play check <Rear (4WD)>). (2)
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caution |
- Insert M12 plain washer and then install the adapter as shown before grinding. Failure
to use the M12 plain washer will cause the brake disc to be deformed and earth incorrectly.
- To grind the brake disc, ensure that all the nuts (M12 X 1.5) are tightened evenly
and in a diagonal sequence to the specified torque (100 N·m). Failure to use all the nuts
(M12×1.5), excessive or uneven tightening torque will cause the brake disc to deform
or judder.
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Correct the brake disc uneven thickness by grinding it while in place on the vehicle.
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1.Check for wheel bearing looseness in the axial direction (Refer to GROUP 26 - On-vehicle
Service, Wheel bearing axial play check <Front>,
GROUP 27A - On-vehicle Service, Wheel bearing axial play check <Rear (2WD)> or
GROUP 27B - On-vehicle Service, Wheel bearing axial play check <Rear
(4WD)>).
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2.If the axial play is within the limit value, secure the brake disc by tightening the
nut (M12×1.5) evenly to the specified torque (100 N·m).If the axial play still
exceeds the limit value, replace the wheel bearing. Then secure the brake disc by tightening
the nut (M12×1.5) evenly to the specified torque (100 N·m).
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3.Place a dial gauge ca. 5 mm inward from the circumference of the brake disc to measure
its run-out. Limit:
0.06 mm <Front> 0.08 mm <Rear>
4.If the brake disc run-out exceeds the limit value, rephase the brake disc to the hub
so that the minimum brake disc run-out is obtained.
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5.caution |
- Insert M12 plain washer and then install the adapter as shown before grinding. Failure
to use the M12 plain washer will cause the brake disc to be deformed and earth incorrectly.
- To grind the brake disc, ensure that all the nuts (M12 X 1.5) are tightened evenly
and in a diagonal sequence to the specified torque (100 N·m). Failure to use all the nuts
(M12×1.5), excessive or uneven tightening torque will cause the brake disc to deform
or judder.
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If the brake disc run-out exceeds the limit value after rephasing, grind the disc while
in place on the vehicle so that the brake disc run-out is within the limit value.
note |
If it is suspected that the brake disc thickness will be below the limit value, replace
the brake disc. Then rephase the brake disc so that the minimum brake disc run-out is obtained,
or grind the disc while in place on the vehicle so that its run-out is below the limit value.
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